For sporting events like football matches, even if the governments are telling that everyone is free to wear a mask or not, you as an individual should think on how important it is to wear one for your own protection.
Our government still keeps reminding us to wear facemask but since we are level one in COVID alert people prefers to not wear their facemask their alibi is they already got their vaccines and they are immune to it, but unfortunately there is no such thing as immunity we can still get it but our immune system can combat it if we have completed our vaccines, I still wear my facemask wherever I go there are times that I'm the only one who's wearing a facemask in one public place, I prefer to keep it and be different, the sports industry maybe back and people can freely watch but they should keep reminding people to wear a mask.
The sports organizations should first be the ones to remind people to wear their masks.